1021112210000 has 100 divisors (see below), whose sum is σ = 2497703894532. Its totient is φ = 404233728000.

The previous prime is 1021112209991. The next prime is 1021112210003. The reversal of 1021112210000 is 122111201.

It can be written as a sum of positive squares in 10 ways, for example, as 828587831824 + 192524378176 = 910268^2 + 438776^2 .

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×1021112210000² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021112210003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 443654 + ... + 1496346.

Almost surely, 2^{1021112210000} is an apocalyptic number.

1021112210000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021112210000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248851947266).

1021112210000 is an abundant number, since it is smaller than the sum of its proper divisors (1476591684532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021112210000 is an equidigital number, since it uses as much as digits as its factorization.

1021112210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052818 (or 1052797 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1021112210000 its reverse (122111201), we get a palindrome (1021234321201).

The spelling of 1021112210000 in words is "one trillion, twenty-one billion, one hundred twelve million, two hundred ten thousand".